Threat Description

First

Details

Aliases: First, VBSV, WSV, Windows Scripting Virus, WSH, FWSV, Rabbit
Category: Malware
Type: Worm
Platform: VBS

Summary



VBS/First is the first virus to use Windows Scripting Host. This is a macro-like technique for Windows 98 and NT 5.0.

Windows Scripting Host macros come in files with VBS and JS extensions. You do not need any MS Office application or Internet Explorer in order to execute these macros - just double-clicking is enough to run them.

When VBS/First is executed, it will locate and infect other VBS macro files.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details



Two variants of the VBS/First virus will try to connect to Code Breakers website on the 15th of the month.

The virus is also shows a messagebox like this:

VBSv v2.0
        by Lord Natas/CodeBreakers


The VBS/First.C variant (VBSV2.0) is able to infect both VBS and .JS files





Description Created: Katrin Tocheva & Mikko Hypponen


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